EP3637625B1 - Amplificateur multifonctionnel - Google Patents

Amplificateur multifonctionnel Download PDF

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Publication number
EP3637625B1
EP3637625B1 EP19201974.3A EP19201974A EP3637625B1 EP 3637625 B1 EP3637625 B1 EP 3637625B1 EP 19201974 A EP19201974 A EP 19201974A EP 3637625 B1 EP3637625 B1 EP 3637625B1
Authority
EP
European Patent Office
Prior art keywords
signals
amplifier
case
multifunctional
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19201974.3A
Other languages
German (de)
English (en)
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EP3637625A1 (fr
Inventor
Elad Domanovitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Actelis Networks Israel Ltd
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Actelis Networks Israel Ltd
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Publication date
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Publication of EP3637625A1 publication Critical patent/EP3637625A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1415—Two-way operation using the same type of signal, i.e. duplex using control lines
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
    • H03K19/177—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components arranged in matrix form
    • H03K19/17736—Structural details of routing resources
    • H03K19/17744—Structural details of routing resources for input/output signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H04B3/38—Repeater circuits for signals in two different frequency ranges transmitted in opposite directions over the same transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing

Definitions

  • the present invention relates to amplifiers for Digital Subscriber lines (DSL) for signals such as data signals, designed to amplify signals and thereby enable them to extend rate per given reach or to extend coverage for a given service.
  • DSL Digital Subscriber lines
  • G.Fast aims to provide ultra-high speeds over copper twisted pairs, up to and sometimes even exceeding speeds of 1 Gbps.
  • the planned loop lengths for G.Fast were from 50 to 250 meters (150 to 750 feet). Current implementations reach up to 500 meters.
  • G.Fast is being standardized as the ITU Telecommunication Standardization Sector (ITU-T) Recommendation G.9701. Similar to currently deployed technologies, G.Fast supports vectoring, which reduces far-end crosstalk that is generated in multi-pair deployments and is a significant impairment at higher frequencies.
  • the first version of G.Fast operates over frequencies of up to 106 MHz, and uses linear vector pre-coding to eliminate crosstalk in both downstream and upstream directions.
  • a future version of G.Fast may operate over frequencies of up to 212 MHz, and may support higher-performance non-linear pre-coding to allow for even higher speeds.
  • G.Fast uses time-division duplexing (TDD).
  • TDD time-division duplexing
  • An example of signal booster for G.Fast TDD signals is disclosed in PCT Patent Application WO 2017/199259 .
  • VDSL2 is being standardized as ITU-T Recommendation G.993.2.
  • VDSL2 permits the transmission of asymmetric and symmetric aggregate data rates up to 300+Mbits/s downstream and upstream on twisted pairs using a bandwidth up to 35 MHz.
  • the VDSL2 standard defined a wide range of profiles that can be used in different VDSL2 deployment architectures. Recently, a new flavor of VDSL2 was approved in the ITU, being standardized as ITU-T Recommendation G.993.2, VDLS2 profile 35b.
  • VDLS2 uses frequency-division duplexing (FDD).
  • Figure 1A shows a prior art frequency band plan for a VDSL2 profile 17 a
  • Figure 1B shows frequency band assignments for VDLS2 profile 35b
  • FIG. 2 illustrates a prior art comparison between performance of v17a, v35b and G.fast.
  • V35b gives significant advantages over VDLS2 vectoring or G.Fast:
  • TDD Time Division Duplex
  • DSL Digital Subscriber line
  • FDD Frequency Division Duplex
  • the multifunctional amplifier includes first and second bidirectional terminals, at least one first filter connected between said first and second bidirectional terminals for bypassing signals in a first configuration, an amplifier circuit arranged in a signal path between first and second bidirectional terminals to amplify said signals, the amplifier circuit being operable in a second configuration for amplifying said signals in one direction along the signal path and a third configuration for amplifying said signals in the opposite direction along the signal path, and a control circuit configured to monitor a guard interval of the signals between said first and second bidirectional terminals, and, in a case a drop of the signals during the guard interval is detected, to set the amplifier to operate for G.Fast service, and in a case the signal is stable, set the amplifier for VDSL2 profile 35b service.
  • Some embodiments of the present invention may be used to provide an analog amplifier which is inserted over copper line at an appropriate distance between the CO and CPE. It is an apparatus which bypasses uplink and downlink signals in a first configuration of the frequency bands and amplifies downlink signals in a second configuration of the frequency band. It may be used to support the industry requirement ITU-T Recommendation G.993.2, VDLS2 profile 35b.
  • Some embodiments of the present invention may be used to provide a multifunctional amplifier, designed to amplify signals to extend rate per given reach or to extend coverage for a given service such as G.Fast or VDSL2.
  • FIG 3 illustrates one embodiment of the present invention an analog amplifier 300, for VDSL2 system.
  • the example frequency band assignments for an VDSL2 signal are shown in Figures 1A and 1B . It comprises a first bidirectional terminal on the CO side 301 and a second bidirectional terminal on the CPE side 302.
  • the direction from CO to CPE is referred as downlink or DS
  • the direction from the CPE to the CO is referred as the uplink or US, although signals pass in both directions.
  • the first element is FILTER1 which is a low-pass filter 314, may be needed to filter out uplink and downlink signals 322 and 324 according to a first frequency spectrum configuration, e.g. up to 17.6 MHz, leaving the desired downlink signal.
  • High pass filters 310 and 360 may extract downlink data signals above a second frequency spectrum configuration, e.g. 17.6 MHz.
  • FILTER1 is connected to the CO side by lines 322 and 324 and connected to the CPE side by lines 382 and 384.
  • An amplifier circuit 304 is arranged in the signal path between the high pass filters 310 and 360.
  • Amplifier circuit 304 amplifies signals in one direction, the DS direction.
  • Circuit amplifier 304 includes the usual components known to those skilled in the art such as not limited to variable gain amplifier PRE-AMP 312 or line driver 316.
  • PRE-AMP 312 is connected to FILTER2 310 by lines 332 and 334 and may provide up to approximately 30 db of gain to the downlink signal.
  • FILTER3 315 is connected to PRE-AMP 312 by lined 342 and 344 and may be used to shape the amplification curve.
  • filter FILTER4 may be optional. It has three main purposes:
  • a Distribution Point may require power.
  • Reverse power feeding can be used to feed a DPU (DLSAM) on the CO or DP side
  • the CPE may include a power feeding unit, as shown in Figure 4 .
  • a system 400 according to some embodiments of the invention comprises an electronic circuit and a customer premise equipment including a power feeding unit (RPF) 412.
  • the service provider apparatus in some systems may include a DPU 402 and a modem 404 modulating or demodulating signals. DPU 402 and modem 404 may be located at a DP.
  • a loop extender 408 is connected by respective lengths of wire L1 and L2 between the CO, shown as remote cabinet 406 and the CPE 414.
  • Some embodiments of the present invention may be used to provide a multifunctional amplifier, designed to amplify signals to extend rate per given reach or to extend coverage for a given service in TDD system such as G.Fast or FDD system such as VDSL2.
  • Figure 5 shows a multifunctional amplifier 500, designed to amplify signals to extend rate per given reach or to extend coverage for a given service.
  • the multifunctional amplifier 500 may be used to provide means for the extension of the G.Fast service, for example to enable signals to be propagated over greater distance.
  • the multifunctional amplifier 500 may be used to provide an amplifier for the VDSL2 35b.
  • the multifunctional amplifier 500 comprises a first bidirectional terminal 502 on the CO side and a second bidirectional terminal 504 on the CPE side.
  • a multifunctional amplifier according to some embodiments of the present invention may be installed in systems using different kinds of transmission media including but not limited to wire, e.g., copper.
  • An amplifier circuit 520 is arranged in the signal path between the high pass filters 530 and 532.
  • Amplifier circuit 520 includes a first amplifier or line driver 540 for amplifying signals in one direction, DS, and a second amplifier of line driver 542 for amplifying signals in the opposite direction.
  • Each amplifier 540, 542 supplies signals, e.g., data signals to an analog convertor ADC 562.
  • ADC 562 is used to detect signals output from the respective amplifiers 540, 542.
  • the output from the ADC 562 is connected to a control or SYNC circuit 560.
  • the amplifier circuit 520 is operable in a first configuration for amplifying signals in one direction along the signal path and a second configuration for amplifying signals in the opposite direction along the signal path.
  • guard interval between the end of the DS transmission and the beginning of the US transmission and vice versa. During the guard interval no data signals are transmitted.
  • a system is proposed which may avoid the problem of instability. This may be achieved according to embodiments of the invention by enabling amplification only at the direction of transmission (and disabling amplifiers at the other direction).
  • a detector is used to detect when transmission is stopped, or at least when transmission of data is stopped, or there is a silence period or interruption in transmission.
  • amplification may be disabled in one direction an enabled in the opposite direction. For example, if transmission stops at the DS direction, amplification in this direction may be disabled and amplification in the US direction may be enabled and vice versa.
  • a logical circuit or microcontroller unit MCU 570 may be used to detect if the multifunctional amplifier 500 may be used for TDD service, e.g., G.Fast service or an FDD service, e.g., a VDSL2 V35b service (in TDD, the signal into the ADC 562 is dropping during the guard time, where in FDD the signal is stable).
  • TDD service e.g., G.Fast service
  • FDD service e.g., a VDSL2 V35b service
  • control circuit 560 is arranged to disconnect switch 552 (e.g., switch 552 in open state) to disable any amplification in the US data path between the bidirectional terminals 510, 520 and is arranged to connect switch 540 (switch 540 in close state) to enable any amplification in the DS data path between the bidirectional terminals 510, 520.
  • switch 552 e.g., switch 552 in open state
  • switch 540 switch 540 in close state
  • control circuit 560 is arranged to detect a silent period or interruption in the signals, for example in signals in one of the first and second bidirectional terminals 510 and 520, such as the guard period. In response to detection of interruption, according to some embodiments of the invention, the control circuit 560 is arranged to control the amplifier circuit 520 to change configuration.
  • incoming signals are filtered by low pass filters 524 and 522 to pass voice signals and in the downstream direction to extract direct current "DC".
  • High pass filters 530 and 532 extract data signals. Extracted DC is transformed in DC/DC convertor 580 to provide power to components of the multifunctional amplifier 500.
  • low pass filters 524 and 522 are equivalent to FILTER1 described previously and shown at Figure 3 .
  • the control unit 560 set DS amplification constantly.
  • Amplification block 540 is equivalent to amplification block 304 described previously and shown at Figure 3 .
  • High pass filters 530 and 532 are equivalent to blocks 310 and 360 described previously and shown at Figure 3 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Amplifiers (AREA)

Claims (5)

  1. Un amplificateur multifonctionnel (500) pour signaux Time Division Duplex (TDD) sur une ligne d'abonné numérique (DSL) de TDD et pour signaux Frequency Division Duplex (FDD) sur une ligne d'abonné à très haut débit (VDSL2), comprenant :
    une première (502) et une seconde (504) bornes bidirectionnelles ;
    au moins un premier filtre (521, 524) connecté entre lesdites première et seconde bornes bidirectionnelles pour contourner les signaux dans une première configuration ;
    un circuit amplificateur (520) disposé sur un chemin de signal entre lesdites première et seconde bornes bidirectionnelles pour amplifier lesdits signaux, ledit circuit amplificateur pouvant fonctionner dans une seconde configuration pour amplifier lesdits signaux dans une direction le long du chemin de signal et dans une troisième configuration pour amplifier lesdits signaux dans la direction opposée le long du chemin du signal ;
    et caractérisé en ce qu'il comprend en outre :
    un circuit de commande (560, 570) configuré pour surveiller un intervalle de garde des signaux entre lesdites première et seconde bornes bidirectionnelles et, au cas où une chute de signaux est détectée pendant l'intervalle de garde, pour régler l'amplificateur afin qu'il fonctionne sur le service G.Fast, et au cas où le signal est stable, pour régler l'amplificateur pour qu'il fonctionne sur le service VDSL2-profile 35b.
  2. Amplificateur multifonctionnel (500) selon la revendication 1, dans lequel le circuit de commande comprend en outre un circuit logique (570) permettant de détecter si les signaux entre lesdites première et deuxième bornes bidirectionnelles sont des signaux TDD, et au cas où lesdits signaux sont des signaux TDD, ledit circuit de commande (560, 570) est agencé pour détecter une période de silence dans lesdits signaux en cas de signaux TDD, et en réponse à la détection d'une période de silence, pour envoyer une commande de changement de configuration audit circuit amplificateur.
  3. Amplificateur multifonctionnel (500) selon la revendication 1, dans lequel le circuit de commande comprend en outre un circuit logique (570) permettant de détecter si les signaux entre lesdites première et deuxième bornes bidirectionnelles sont des signaux FDD, et au cas où lesdits signaux sont des signaux FDD, ledit circuit de commande (560, 570) est agencé pour envoyer une commande de changement de configuration audit circuit amplificateur.
  4. Amplificateur multifonctionnel (500) selon la revendication 1, caractérisé en ce qu'en cas de mode de service VDSL2-profile 35b, le circuit de commande désactive toutes les amplifications dans un chemin de données amont entre les bornes bidirectionnelles et permet toutes les amplifications dans un chemin de données aval entre les bornes.
  5. Amplificateur multifonctionnel (500) selon la revendication 1, caractérisé en ce qu'en cas de mode de service G.Fast, l'unité de commande fait filtrer les signaux entrants au moyen de filtres passe-bas (522, 524) et fait passer des signaux vocaux, et, en direction aval, fait extraire le courant continu, CC, et amène en outre des filtres passe-haut (530, 532) à extraire des signaux de données, ledit courant CC extrait étant transformé au moyen d'un convertisseur CC/CC (580) pour fournir de l'énergie à l'amplificateur multifonctionnel.
EP19201974.3A 2018-10-08 2019-10-08 Amplificateur multifonctionnel Active EP3637625B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16/154,137 US11082194B2 (en) 2018-10-08 2018-10-08 Multifunctional amplifier

Publications (2)

Publication Number Publication Date
EP3637625A1 EP3637625A1 (fr) 2020-04-15
EP3637625B1 true EP3637625B1 (fr) 2021-09-01

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EP19201974.3A Active EP3637625B1 (fr) 2018-10-08 2019-10-08 Amplificateur multifonctionnel

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US (1) US11082194B2 (fr)
EP (1) EP3637625B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117321986A (zh) * 2021-05-13 2023-12-29 Ppc宽带公司 用于在增强型双工频率范围内进行双向通信的有线网络系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8577283B2 (en) * 2005-07-15 2013-11-05 Qualcomm Incorporated TDD repeater
JP5243615B2 (ja) * 2008-11-05 2013-07-24 テレフオンアクチーボラゲット エル エム エリクソン（パブル） デュアルモード基地局
US20140161000A1 (en) * 2012-12-10 2014-06-12 Futurewei Technologies, Inc. Timing offset correction in a tdd vectored system
JP2015204604A (ja) 2014-04-16 2015-11-16 シャープ株式会社 通信回路および電子機器
US20170055214A1 (en) * 2015-08-18 2017-02-23 Wilson Electronics, Llc Wireless device signal amplifier
US11082090B2 (en) 2016-05-18 2021-08-03 Actelis Networks (Israel) Ltd. Time-division duplexing signal booster

Also Published As

Publication number Publication date
US20200112422A1 (en) 2020-04-09
EP3637625A1 (fr) 2020-04-15
US11082194B2 (en) 2021-08-03

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